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Poster: WaverBoy Date: Jul 20, 2004 1:48pm
Forum: prelinger Subject: Why are so many clips encoded with .mpa extension and not .mpeg or .mpg?

Again, just curious...sorry if this is a stupid question. :o

This post was modified by WaverBoy on 2004-07-20 20:48:43

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Poster: Steve Nordby Date: Jul 20, 2004 10:41pm
Forum: prelinger Subject: Re: Why are so many clips encoded with .mpa extension and not .mpeg or .mpg?

I'm not aware of any Perlinger films with a .mpa extention. The mpeg 1's are ".mpg", mpeg 2's are ".mpeg", mpeg 4's are ".mp4", and divx are ".avi". ".mpa" should only be used for mpeg audio.

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Poster: WaverBoy Date: Jul 21, 2004 1:51am
Forum: prelinger Subject: Re: Why are so many clips encoded with .mpa extension and not .mpeg or .mpg?

Some Prelinger titles with .mpa extensions:

MY JAPAN
AGE OF TURMOIL
ARE YOU POPULAR?
ARE YOU READY FOR MARRIAGE?
LIVE AND LET LIVE
NONE FOR THE ROAD
ONE GOT FAT
SIGNAL 30 PART 1
SIGNAL 30 PART 2
SPECIAL DELIVERY
STRANGER

Out of all the clips I've downloaded so far, only one has had the proper file extension. .mpa is a file extension for an audio-only file in Layer 2 format. Why this extension is on these Layer 2 files which contain both audio and video I don't know.

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Poster: Administrator, Curator, or Staffsimon c Date: Jul 21, 2004 2:05am
Forum: prelinger Subject: Re: Why are so many clips encoded with .mpa extension and not .mpeg or .mpg?

*sigh*

WaverBoy, look closely at the filenames:

http://www.archive.org/movies/details-db.php?collection=prelinger&collectionid=00005
http://www.archive.org/movies/details-db.php?collection=prelinger&collectionid=03534

I see MPEG, MPG, and MP4, but no MPA. I'm betting that whatever browser or download manager you're using is renaming them on the way down, or similar.

Thanks,
Simon.
[Archive admin.]

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Poster: cashel Date: Jul 21, 2004 3:34am
Forum: prelinger Subject: Re: Why are so many clips encoded with .mpa extension and not .mpeg or .mpg?

Simon..what you said is true. I had a similar problem in downloading MP4 when using Internet Explorer .. When I switched to Mozilla (now using Firefox) the problem disappeared.

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Poster: WaverBoy Date: Jul 21, 2004 1:30pm
Forum: prelinger Subject: Re: Why are so many clips encoded with .mpa extension and not .mpeg or .mpg?

Hey, sorry you had to sigh at me...I don't mean to be a bother. Really. Yes, I know, obviously the file descriptions on the site clearly say MPEG1, MPEG2, MPEG4, etc., and >that's< why it was so confusing to see an .mpa extension. How would I know that my browser is changing the file extension? When I downloaded THE INDESTRUCTIBLE MAN in MPEG2 from this site, with the same browser, the file I got had a proper MPEG2 extension. Why would Internet Explorer do an idiotic thing like changing the extensions on some files and not on others, which all originally had identical file extensions? Oops, I guess that last may be a stupid question too. :o

At any rate, no big deal of course; now I know. Thank you. I really do appreciate your help.

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Poster: ridetheory Date: Jul 21, 2004 1:45am
Forum: prelinger Subject: Re: Why are so many clips encoded with .mpa extension and not .mpeg or .mpg?

I have had the problem of downloading movies with really screwy extension names. Sometimes just re-naming the file works, and other times, I have to just give up. Usually, the file has a conventional extension, and then another extension, but not always. Also, sometimes the file name is too long, and the extension gets cut off.

Sorry I can't cite any specific cases.

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